161156494272 has 56 divisors (see below), whose sum is σ = 426423181696. Its totient is φ = 53715057408.

The previous prime is 161156494253. The next prime is 161156494273. The reversal of 161156494272 is 272494651161.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161156494273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4591863 + ... + 4626825.

Almost surely, 2^161156494272 is an apocalyptic number.

161156494272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161156494272 is an abundant number, since it is smaller than the sum of its proper divisors (265266687424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161156494272 is a wasteful number, since it uses less digits than its factorization.

161156494272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58985 (or 58975 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The spelling of 161156494272 in words is "one hundred sixty-one billion, one hundred fifty-six million, four hundred ninety-four thousand, two hundred seventy-two".